zd1211rw: Use const

Mark arrays const that are unmodified after initializations.

   text	   data	    bss	    dec	    hex	filename
  19291	     56	   4136	  23483	   5bbb	drivers/net/wireless/zd1211rw/zd_chip.o.old
  19291	     56	   4136	  23483	   5bbb	drivers/net/wireless/zd1211rw/zd_chip.o.new

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/zd1211rw/zd_chip.c

@@ -1448,7 +1448,7 @@ int zd_rfwritev_locked(struct zd_chip *chip,
  */
 int zd_rfwrite_cr_locked(struct zd_chip *chip, u32 value)
 {
-	struct zd_ioreq16 ioreqs[] = {
+	const struct zd_ioreq16 ioreqs[] = {
 		{ CR244, (value >> 16) & 0xff },
 		{ CR243, (value >>  8) & 0xff },
 		{ CR242,  value        & 0xff },
@@ -1475,7 +1475,7 @@ int zd_rfwritev_cr_locked(struct zd_chip *chip,
 int zd_chip_set_multicast_hash(struct zd_chip *chip,
 	                       struct zd_mc_hash *hash)
 {
-	struct zd_ioreq32 ioreqs[] = {
+	const struct zd_ioreq32 ioreqs[] = {
 		{ CR_GROUP_HASH_P1, hash->low },
 		{ CR_GROUP_HASH_P2, hash->high },
 	};